Electric motor



1 (No Model.) 0.. J. VAN DEPOELE.

ELECTRIC MOTOR.

No. 285,857. Patented Oct. 2, 1883.

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UNITED STATES PATENT ()FFICE.

CHARLES J. VAN DEPOELE, OF CHICAGO, ILLINOIS.

ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 285,857, dated October 2, 1883.

Application filed December 523, 1582. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES J. VAN DE- roELE, of Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Electric Motors; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which forma part of this specification.

My invention relates to new and useful improvements made in electric motors by which the speed and power of the same can be varied at will, and by which said motors will accommodate themselves to the varying electromotive force of the lines from which the current is taken; and it consists, briefly, in the mode of winding and connecting the conductor or helices of the field-of-force magnet of said motors.

The following is a clear description of my improvements, reference being had to the annexed drawings, which form part of this specification.

Figure 1 shows the electric motor as connect-ed to the automatic regulator. A and A are the positive and negative poles or brushes of the armature properlyconnected to B and B, which are theinside terminals of the helices wound around the magnets M and M B and B are the outside terminals of the helices of the magnets h and M". From B and 13 start the different conductors from the helices to bindingposts and contacts 0 G O 0, 8:0. These are all placed along a bar, H, made of wood or other non-conducting material. D D are binding-posts and carriers to the contact-bars E E, pivoted at D D. E E are contact-bars, made of brass or other suitable metal, faced with platinum, allowing the current to pass from D D to contacts 0 O O, 850.; F, plunger working up and down into the magnet M, making and breaking contacts between E E and contacts 0 O O, &c. G, conductor fromD to negative pole; G, conductor from D to magnet M; G", conductor from magnet M to positive binding-post P.

Fig. 2 is a diagram of connections, in which the regulation is done by hand; A A armature; B and B, inside terminals of field-helices; B B, outside terminals of field-helices; G C C O, &c., bindingposts and contacts, to which all the terminals of the field-helices are brought out; H H, bars of wood or other insulating material, to which all the binding-posts and contacts 0 O O are fastened, at the same time insulating C O G O, &c., from one another; N, negative pole; P, positive pole. E are contact-bars. O is a crossbar, made of wood or some other insulating material, bearing upon bars E and E. S S are springs lifting the bars E and E out of contact with O O 0 when the lever L stands perpendicular; L, handlever, attached to the eccentric K; K, eccentric intended to press down upon the bars E E in.

order to bring more or less of the contacts 0 O O, &c., in circuit, so as to regulate the power of the motor; I, semicircle provided with indentations, by which the hand-lever L can be held in position.

Figs. 3 and 4 represent the contact-bars E E with the contacts G O O, &c.; E, movable bar; I I, contact points and springs; J J, frame in which the contact-points I work up and down; H, bar of wood or other insulating material, to which all the contacts 0 O O, the binding posts, &c., are fastened.

Having described the different parts of my invention, I will now proceed to explain their action while in operation.

As will be seen in Figs. 1 and 2, the conductors or helices around the field-of-force magnet are composed of a number of individual conductors, all insulated from one another, and are preferably made up in the shape of a cable. The total number of conductors have a conductivity equal to what is necessary to the motor to do its maximum duty. Thus by cutting out or in circuit a greater or smaller number of the conductors or helices the resistance around, the field will be gradually increased or decreased, as the case may be, thus giving a perfect control over the current energizing the motor. The mode of winding is just as simple as if a single wire were used. The inner terminals of all the wires in one cable are all soldered together, and are in contact with the armature, as shown in drawings, Figs. 1 and 2, while the outer terminals of all the separate wires of the cable are all brought out to the contacts 0 G C C, &c., thence through bars E back to source.

Fig. I shows an arrangement for working the motor automatically, which may be applied to a moving vehicle or to a stationary motor. The current enters at 1?, passes to magnet M by conductor G thence to bar E, contacts 0 G G, &c., thence to field-magnets at B to B and armature at A out at A to B, and out at B to contacts 0 G O and bar E to post D, and by conductor G to negative pole N. If now a current is sent through the system, the motor will begin to revolve and perform its duty; but since .the main current from which it is tapped is liable to raise and drop its electro-motive force, the current supplied to the motor will be regulated by means of the magnet M by either raising or lowering the bars E E upon the contacts 0 O O, changing the resistance in the motor to suit the electro-motive force of the main. This will regulate the current to do a certain amount of work; but since the amount of work demanded from said motor will vary occasionally, it is necessary to employ some other mechanical device besides the current-regulating device in order to obtain a steady motion or speed.

Fig. 2 shows another device, by means of which the speed of the motor and the amount of current sent through the same can be regulated by a-hand-lever, L, as already described above. I v The advantage I claim for this mode of winding a motor is that said motor can be made to work perfectly even. withconstant rise and fall of the electro-motive force on a long line, whence the current is taken, and will thus render it practical to place any num-.

.ber of motors on a line without regard to its length, or to the amount of current the other motors may take from the line, providing, however, that the prime generators have the necessary capacity. The forming of the wire into a cable previous to winding it on the core has the advantages that it is more readily wound on the core, giving the same ease of winding as if it were a single wire, thus giving a more even winding than is possible on any other system, and economizing space, whereby morepowerful magnets can be made.

It will be readily understood that since no outside resistances are used there will be minimum loss in the conversion from one force into c the other.

Having described my invention and the application thereof, what I claim as new, and desire to secure by Letters Patent, is-

1. In an electric motor, the helices of the field-magnets of the same, composed of a cable made up of anynumber of individual wires, insulated through their whole length from one another, and connected at their outer terminals with separate contact-points, while their other ends are connected to the brushes, as described, and for the purposes specified. V r v 2. In an electric motor, the helices of the field-magnets of the same, wound with anumber of individual small conductors, formed in a cable, and proper means for allowing the current to pass through the same in multiple are when the tension on the main line is low,

and also proper means for cutting'out of circuit any number of the individual wires'with the increase of the tension on the line, substantially as described.

3. Anelectric motor having field-magnets wound with a cable, consisting of a number of I less of the contact-points, substantially .as 0

described.

CHARLES J. VAN DEPOELE.

Witnesses:

H. S. SPRAGUE, E. W. ANDREWS. 

